Command: $ cb file1.c > file2.c

Could anyone explain how to use the following command:
$ cb file1.c > file2.c

I'm suppose to write a program to read input from file1.c and write the output to file2.c My lecturer insisted us to use this command and I have no idea how to use.

My program is as follows:

/* To calculate the sum of 1/(x*x) */
#include<stdio.h>
main()
{
int i,n;
float sum;
$ cb file1.c file1.c > file2.c
scanf("%d", &n);
for (i=n, sum=0.0;i>0;i--)
sum += 1/((float)i*(float)i);

printf(out,"Sum=%f\n", sum);

}

I had tried inserting the command directly as you can see into the program but when I compiled the following errors appeared:
try.c: In function `main':
try.c:13: `$' undeclared (first use in this function)
try.c:13: (Each undeclared identifier is reported only once
try.c:13: for each function it appears in.)
try.c:13: parse error before `cb'
try.c:18: `out' undeclared (first use in this function)

Please help. Thanks

> cb file1.c > file2.c
This is a command you type in at the command line to tidy up your code. It has no place inside the code itself.

Just delete this line from your source code and try compiling it again.

Example commands
$ gcc file1.c
$ cb file1.c > file2.c

Thanks a lot, Salem